I have had a cold over a month ago. my left ear has seemed blocked since then. i have to move telephone to right ear to hear - am always saying what?

Ear infection?: It is possible that you had an ear infection when you had your cold or that the cold caused some fluid to accumulate in your ear canal. This fluid can take weeks to reabsorb, and may be causing your symptoms. If it has been more than 1 month, go see your doctor for an evaluation to see if you need antibiotics or other treatment options.